Paul stein



No. 752,009. PATENTED EB, 1904.

' P. STEIN.

LOCK. v APPLICATION FILED SEPT. 29, 1903. N0 MODEL.

FauZ {9677/ UNITED STATES Patented February 9, 1904.

PATENT OFFICE.

PAUL STEIN, OF HOMESTEAD, PENNSYLVANIA.

LooK.

SPECIFICATION forming part of Letters Patent No. 752,009, dated February9, 1904.

ApplicationfiledSeptember 29, 1903- Serial No. 175,047. (No model.) i

- drawings.

This invention relates to certain new and useful improvements in looks,and relates more particularly to that type of locks which employlock-bolts that require the key-ward actuating the same to be turned ina particular manner to unlock the bolt-lock.

Briefly described, the present invent-ion comprises a plurality oflock-bolts and a latchbolt which may be operated to retract the sameeither by a key or by a key-ward mounted on the knob-shank, but whichlock-bolts and latch-bolt are only operative by the turning of thekey-ward or knob-shankin a certain manner, whereby to successivelyretract said lock-bolts and latch-bolt.

In describing the invention in detail reference is had to theaccompanying drawings, forming a part of this specification, and whereinlike numerals of reference indicate like parts throughout the severalviews, in which Figure 1 is a plan view of a lock constructed inaccordance with my invention, one plate of the casing being removed toshow the various parts in their position, the said parts being shown infull lines in the locked position and in dotted lines in the unlocked orretracted position. Fig. 2 is a detached detail perspective view of oneof the lock-bolts. Fig. 3 is a similar view of the other of thelock-bolts. Fig. 4 is a like view of the latchbolt. Fig. 5 is a likeview of a part of the key, and Fig. 6 is a like view showing the wardformed on the shank of the door-knob.

My improved lock resembles the principle of the combination-lock in thatit requires specific knowledge by the operator of the particular mannerin which the key must be manipulated in order to retract or unlock thelock-bolts and latch-bolt. By this means I am enabled to construct alock of the ordinary lock-bolt type generally employed in connectionwith doors, which may not be picked or opened by unauthorized persons.

To put the invention into practice, I provide a casing of the usual typeemployed embodying a side plate 1, which carries the rim or flange 2, onwhich the opposite side plate (not shown) rests and against which it isheld by screws (not shown) passed through apertures 3 in the plate 1. Asis generally the case, the flange or rim 2 is provided with pins L forengagement into the side plate, which is not shown. The flange or rim 2has its ends flanged or bent outwardly at right angles and secured tothe inner face of the escutcheon-plate 5, which is provided withopenings to receive the lock-bolts and the latchbolt. I may employ asingle lock-bolt in connection with a single latch-bolt or a pluralityof lock-bolts in connection with a latch-bolt, and in the presentillustration I have shown two lock-bolts and a latch-bolt.

The lock-bolt 6 is provided with slots 7 '7, that receive guide-pins 88, carried by the plate 1, the bolt being limited in its movement intolocking position by these pins, as well as by a rib or flange 9, carriedby the bolt to engage with the inner face of the escutcheon-plate. Thisrib or flange also serves as the part of the bolt to be engaged by thespring 10, which forces the bolt into locked position when the means isreleased which holds same in the unlocked position. bearing against saidrib or flange and is wound or coiled around a stud or pin 11, with itsother end held rigid on said pin or stud. This bolt 6 carries on itsupper face along one side and adjacent its inner end aboss12, providedwith a notch 14, the notch being cut into the edge of the bolt as wellas into the edge of the boss, and the specific purpose of which notchwill more presently appear.

The bolt 6 carries near its inner end a pin 15, to whichis pivotallyconnected one end of a link 16, theother end of which link is pivotallyattached to the arm 17 of the substantially triangular lever 18, whichhas its arm 19 pivotally mounted on a pin or stud 20, carried by theplate 1. This pin or stud 20 has pivotally mounted thereon underneaththe arm 19 This spring has one end shaped, as shown, to be engaged withthe ward, as will be more fully explained. The lock-bolt 6 is held inthe unlocked or retracted position by means of a locking-lever pivotallyattached, as at 28, to the plate 1 and having its longer leg 29 providedat its free end with a right-angular lug 30, which is adapted to engagein the notch 14 of the boss 12 when the latch-bolt 6 is in the lockedposition and when the said bolt is in the retracted position is "adaptedto engage the forward end of the boss 12, a notch 14 being provided inthe edge of the lock-bolt 6 to permit this engagement of the lug withthe end of the boss 12. The shorter leg 31 of the locking-lever isprovided with a right-angular extending lug 32, extending outwardlytoward the opposite side plate and which is adapted to be engaged by theheel of the latch-bolt when the latter is operated, whereby to disengagethe lockinglever from the lock-bolt and permit the latter to assume itslocked position. A spring 33 bears against the back of the locking-leverfor' the purpose of holding said lever in the notch 14 when thelock-bolt 6 is in the locked posi-v tion and in the notch 14 when thelock-bolt 6 is in the unlocked position, the one end of this springbeing rigidly secured to a stud or pin 34, secured to the plate 1.

A lock-bolt 35 is provided with a rib or flange 36 of the same form asthe rib or flange 9 of the lock-bolt 6. A spring 37 engages this rib orflange and has its one end afiixed to the boss or stud 38. The lock-bolt35 is provided with longitudinal slots 39 40, the former of whichreceives the guide-pin 41, carried by the plate 1, and the slot 40receiving a screw or pin 42, on which is pivotally mounted a finger 43.A dog 44 is pivoted on the lock-bolt 35 near its inner end and isprovided near its free end on the upper face with aboss 45 and has ashoulder or notch 46 formed on the free end of said boss or dog. Thelockplate 47 is arranged at one side edge of the lock-bolt 35 and formedwith an eye 48, which receives the pin 49, carried by the plate 1. Thislock-plate 47 carries a right-angular extending plate 50, which isadapted to engage with the lower edge 51 of boss 45, as seen in Fig. 1of the drawings. The lock-plate 47 is engaged by a spring 52, having itsinner end coiled around and secured to stud or pin 53, carried by theplate 1. A spring 54 is secured to the dog 44 and bears against, or maybe secured thereto, a lug 55, carried on the upper face of the lock-bolt35 near its inner end, against the shoulder 56 of which lug the lowerend of the plate 47 is adapted to engage when the lock-bolt 35 is in theunlocked or retracted position.

The latch-bolt comprises a latch-head 56, to which is secured in anydesirable manner the shank 57. This shank is provided with a slot 58,through which extends the throwing-lever 25 for actuating the lock-bolt6. Pivotally mounted in the shank 57 is a block 59, which carries a wardor tumbler 60, adapted to be engaged by the Ward on the key-shank or onthe shank of the door-knob, as the case may be. The block 59 extendsthrough the shank 57 and is engaged by the spring 61, securely fastenedat its other end to the shank of the latch-head and provided with a;slot 62, registe'ring with the slot 58, whereby to receive thethrowing-lever 25. The latch-head 56 is provided with a channel orgroove to receive the rib or guide .63, mounted on the plate 1, and atits inner end the shank 57 is provided with aright-angular portion 64,also provided with a groove to receive the guide-rib 66, mounted on saidplate 1. The right-angular portion 64 of the shank 57 is .engaged by thespring 67, having its one end secured to a stud or pin 68 in the plate1.

In Fig. 5 I show a key-shank 69, provided with a bit 7 O for actuatingthe lock-bolts. and latch-bolt, and in Fig. 6 I show this bit 7 0provided on the shank 71 of the door-knob 72, this latter constructionpractically making a combination-lock.

To clearly describe the operation, we will assume that the latch andlock bolts are in the locked position, as shown by full lines in Fig. 1,and it is desired to unlock the same. The key-bit (assuming that thelock is to be operated by a key) is inserted through the keyhole 73, andthe key is turned in the direction of arrows 2, until the bit reachespoint 6. The reverse movement is then imparted to the key, so as to movethe bit in the direction of arrows c, and in this reverse or returnmovement the bit 70 engages with the notched IIO or shouldered end 46 ofthe pivoted dog 44 and carries said dog and the lock-bolt 35 inward tothe retracted or unlocked position, (shown in dotted lines in Fig. 1,)and as the lug 55 passes end of lock-plate 47 the latter is forcedinwardly by spring 52,- whereby to hold the said lock-bolt in theretracted or unlocked position. It will be observed that the bit 70 ofthe key in its movement in the direction indicated by arrows a presseddog 44 out of the way, the shoulder 51 of said dog pressing againstplate 50 to depress the lock-plate 47. The lock-bolt 35 is now in theunlocked position, and the movement of the ward in direction of arrows 0is continued, the ward engaging dog or pawl 60, which, being pivoted,moves to allow the bit to pass the same and permits the said bit to beengaged with the hook end 27 of the throwing-lever 25. Continued turningof the key in this direction carries the throwing-lever 25 therewith,moving the same over to the position shown in dotted lines,. and thismovement of the lever 25 actuates the lock-bolt 6 through the medium ofthe rocklever 18 and link 16, moving said lock-bolt to the retracted orunlocked position. (Shown in dotted lines in Fig. 1.) hen the lock-boltassumes the retracted or unlocked position,

spring 83 forces lug 30 into engagement with notch let, so it will beengaged with the forward end of boss 12, and thus hold said lockbolt inthe retracted or unlocked position. Now the movement of the key-bit isagain reversed or moved back in the direction of the arrows (Z, and inthis return movement it engages with the end of pawl or dog 60 andcarries the latch-bolt backward therewith, and as soon as thislatch-bolt head is within the escutcheon-plate the door may then beopened. The relieving of the pressure on the key as soon as the latchhead is moved back far enough to permit the opening of the door allowsthe latch-bolt to return to the position shown in full lines, which isits normal position. If, however, the movement of the keybit in thedirection of arrows (Z is continued until the notched heel 43 of theshank 57 engages with lug 32, the locking-lever for lock-bolt 6 will berocked on its pivot 28 and lug 30 will be withdrawn from engagement innotch 14, and the spring 10 will return the lock-bolt 6 to its lockedposition. The continued turning of the bit in the direction of arrows tobrings said bit into engagement with the finger or dog 43, and as saiddog or finger is moved on its pivot by the engagement of the bit withthe dog or finger the latter depresses lock-plate L7, so as to move itout of engagement with lug 55, and spring t? then forces the lock-bolt35 into its locked position again. Reverse movement or movement indirection of arrows c is now imparted to the key-bit to bring it intoposition to remove through the keyhole the finger or dog 43, moving onits pivot 42 to allow the key-bit to pass and merely depressinglockplate a? without retracting lock-bolt 35.

It will thus be seen that the same security is obtained with a lock ofthe lock-bolt principle as is obtained with a combination-lock havingtumblers, and while I have herein shown and described a practicalembodiment of my invention as it is practiced by me, yet it will beapparent that various changes may be made in the details of constructionwithout departing from the general spirit of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a lock of the type described, the combination with acasing, of alockbolt, a spring engaging said lock-bolt for normally holding same inthe locked position, a throwing-lever pivotally connected to thelock-bolt for moving the same to the unlocked position, springpressedmeans for holding said bolt in the unlocked position, a latch-bolthaving a slot in its shank to receive the throwing-lever of thelock-bolt, a pivoted dog or pawl carried by the shank of said latch-boltto be engaged by the key-bit for retracting said latch-bolt, and aspring for normally holding said latch-bolt in the locked position.

52-. In a lock of the type described, the combination with a casing, ofa slidably-mounted lock-bolt, a slidably mounted latch bolt, athrowing-lever pivoted to the lock-bolt and a pawl or dog pivoted to thelatch-bolt, means for holding the lock-bolt in the unlocked position,said latch-bolt acting as a releasing means for said holding means,substantially as described. I

3. In a lock ofthe type described, two slidably-mounted lock-bolts, incombination with a slidably-mounted latch-bolt, and means carried by thelatch-bolt and lock-bolts whereby they may be operated from the samepoint by reverse movements of the key-bit.

4. In a lock of the type described, two slidably-mounted lock-bolts, andseparate means for holding each lock-bolt in the retracted or unlockedposition, in combination with a slidably-mounted latch-bolt adapted whenmoved to the unlocked position to release the holding means for one ofthe lock-bolts, and means carried by the lock-bolts and latch-boltwhereby they may be operated by the same key at a common point throughreverse movements of the keybit.

5. In a lock of the type described,a slidablymounted lock-bolt, andmeans for holding said bolt in the retracted or unlocked position, incombination with a slidably-mounted latchbolt, and means carried by saidlock-bolt and separate means on the latch-bolt whereby they may beoperated by the same key at a common point by reverse movements of thekey: bit.

6. In a lock of the type described, a slidablymounted lock-bolt, andmeans for holding said bolt in the retracted or unlocked position, incombination with a slidably-mounted latchbolt adapted when actuated bythe key to release the holding, means for the lock-bolt upon reversal ofthe movement of the key, substantially as described.

In testimony whereof I afiix my signature in the-presence of twowitnesses.

. 7 PAUL STEIN.

Witnesses:

A. VVILsoN, E. E. POTTER.

